A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 4140-01-414-1710
NSN 5950-00-068-3998
NSN 5945-00-869-5309
NSN 6130-00-898-4303
NSN 6145-01-370-1242
NSN 6145-00-177-4731
NSN 5925-01-367-2519
NSN 5985-01-510-3461
NSN 5990-01-562-4521
NSN 6220-01-386-9131
NSN 6650-01-589-9916
NSN 5960-01-412-0619